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Ambient noise detection method, device and system for rail transit

An environmental noise and rail transit technology, applied in the field of broadcasting systems, can solve the problems of inaccurate environmental noise, affecting passengers' listening experience, and inability to adjust speaker volume, and achieve the effect of improving listening experience, accurate volume, and improving detection accuracy.

Inactive Publication Date: 2019-05-10
BYD CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, the above-mentioned detection method will have the following technical problems: the detected environmental noise is not accurate enough, and it is easy to cause deviations in point coverage, that is, the noise in one direction represents the noise in all directions of the entire environment, making the broadcast controller When adjusting the volume of the speaker according to the amount of ambient noise collected, the volume of the speaker cannot be adjusted accurately, which greatly affects the listening experience of passengers

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Embodiment Construction

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] The following describes the environmental noise detection method, device, system and broadcasting system for rail transit according to the embodiments of the present invention with reference to the accompanying drawings.

[0036] figure 1 It is a flowchart of an environmental noise detection method for rail transit according to an embodiment of the present invention. It should be noted that the environmental noise detection method for rail transit in the embodiment of the present invention can be applied to the environmen...

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Abstract

The invention discloses an ambient noise detection method, device and system for rail transit. The ambient noise detection method comprises the following steps: when a broadcast loudspeaker is in a mute state, controlling an acquisition device to carry out noise acquisition in multiple directions in sequence in the current area, wherein the acquisition device has a characteristic of single directivity; obtaining the noise data collected by the acquisition device in each direction; and according to the noise data collected in each direction, determining a position area of a noise source. The method can make the location judgment result of the noise source more accurate and improves detection accuracy of the ambient noise.

Description

technical field [0001] The invention relates to the field of urban rail transit broadcast control, in particular to an environmental noise detection method for rail traffic, a detection device, a detection system, and a broadcast system including the detection system. Background technique [0002] Public address systems are an essential function in the rail industry. For example, the station has a ground broadcasting system, and the car has an on-board broadcasting system. In order to ensure that the broadcasting volume meets the requirements of clear sound, uniform sound intensity, and no dead zone under harsh conditions, an environmental noise detection system needs to be added to dynamically adjust the broadcasting according to the size of the environmental noise. Speaker volume. [0003] In related technologies, the environmental noise detection method used in rail transit generally uses an omnidirectional microphone as a pickup to collect environmental noise. Environm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 彭正华
Owner BYD CO LTD
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